Using Simulated Cooling Profile from Computational Simulation Techniquefor Chilled Structures Prediction in Thick Section Casting

摘要

In producing thick-section iron casting rolls for machinery system using chill mould, chilled white iron structure can be produced at the surface for using as wear resisting part. Castings in machinery system typically do not require only hard surface. However, they require an optimizing between hard surface and tougher core for supporting low ductile shell structure. This study was focusing on examining three castings that represented three types of cast iron rolls with controlling as-cast surface structures as mottled cast irons. The cooling data from CastCAE~(TM) casting simulation software were applied to determine correlation between time-temperature profiles and area fraction of eutectic carbide that precipitated during solidifying through austenitic region regarding to microstructures of the cross-section on cast samples were also examined. The examined castings information from simulation can assist foundry in determining as-cast structure of thick-section iron casting rolls with hardness levels of 50-70 HS while designated depth profiles of hard structure were not exceed 20 mm.